PHP (personal home page) is a scripting program language that drives the bulk of the internet website backends today.
Amongst others it is used to program WordPress CRM.
MySQL is the most popular database system used with PHP, but many variations are in use such as MariaDb.
For more on MySQL database, please navigate to http://www.w3schools.com/php/php_mysql_intro.asp
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in Web Hosting Tags: MySQL, PHP